JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Xiaoqing Guo,Shuangju Song,Xue Jiang,Jingru Cui,Yunshuai Li,Wenqing Lv,Haiyan Liu,Yuanyuan Han,Liyong Wang
In this present work, a room temperature coprecipitation method for the synthesis of CaMoO 4 @SiO 2 :Ln (Eu 3+ , Tb 3+ , Dy 3+ ) phosphors was reported. These particles were characterized using X-ray diffraction (XRD), Energy dispersive spectrometer (EDS), Fourier Transform IR spectroscopy (FTIR), scanning electron microscope (SEM), UV-visible spectrophotometer and photoluminescence (PL) respectively. The results indicated that emission intensity of SiO 2 modified samples increased by about 2 times, compared with no-silica modified samples. Multicolor phosphors were also designed by changing the lattice activators (Eu 3+ , Tb 3+ , Dy 3+ ). To further explore its applications, the transparent photoluminescent film was developed through the incorporation of polyvinyl alcohol (PVA), and selective and sensitive detection performance on dichromate was demonstrated in detail. In addition, red emission LED devices was assembled with as-prepared phosphors. The present results provide not only the high-performance phosphors modified by silica , but also a deep explanation of the structure-property relationship of the as-prepared sample. Based on these findings, it can be foreseen that these microparticles will be applied in versatile filed.
研究领域:
材料科学
·
光学
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DOI
高影响因子
Metals
·
2023
·Vol. 13
·期 12
·1972
·
IF 2.9
Huiyu Qian,Zhigang Sun,Tuanjie Liang,Mengyao Wang,Bin Lu,Hongbing Chen,Linwen Jiang
Transparent ceramics (Gd0.975−xLuxDy0.025)3Al5O12(x = 0.2, 0.5, 0.975) are fabricated by vacuum sintering with the transmittance of ~60% at 583 nm. The doping of Lu3+was beneficial to stabilize the garnet phase, and the best doping concentration was 20 at.%. All three (Gd, Lu)3Al5O12:Dy ceramics display typical Dy3+emission, originating from4F9/2→6HJ(J = 15/2, 13/2, 11/2) transition. Temperature-dependent luminescence spectra from 303.15 K to 603.15 K prove that the (Gd, Lu)3Al5O12:Dy ceramics had good thermal stability and could be an ideal yellow-emitting candidate in light-emitting diodes. The luminous efficiency of the encapsulated white LED lamp was found to be ~87.9 lm/W when the injection current was 600 mA. The transparent (Gd, Lu)3Al5O12:Dy ceramics show great application potential in various optical systems especially in the fields of luminescence and display.Keywords:transparent ceramics;luminescence;white LED;luminous efficiency
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Journal of Superconductivity and Novel Magnetism
·
2025
·Vol. 38
·期 6
·231
·
IF 1.7
Liu Wanxia,Gao Yuxia,Li Yaning,Li Yulong,Ren Weijie,Sun Xin,Li Xiaofeng,Wang Mingli
The synthesis, structure, and magnetic properties of Ba 3 REB 9 O 18 (RE = Dy-Yb) compounds were investigated. Rietveld Refinement of the X-ray diffraction (XRD) data confirms that all compounds crystallize in a hexagonal Ba 3 YB 9 O 18 -type structure with space group P 6 3 /m (No. 176) and Pearson symbol hP 62. The lattice parameters a and c increase linearly with the increasing ionic radii of the RE 3+ ions. RE 3+ ions form two-dimensional triangular layers in the ab plane, which are separated by non-magnetic Ba/B-O polyhedra. The magnetic susceptibility measurement reveals no long-range magnetic order or spin glass behavior in any of the compounds above 2 K. The negative Curie-Weiss temperatures indicate dominant antiferromagnetic (AFM) exchange interactions between the RE 3+ ions. The combination of triangular lattice and antiferromagnetic interaction suggests this family of compounds is a promising system for researching magnetic frustration.
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 3
·763-772
·
IF 2.5
Jiang Tongzhou,Wu Fei,Ren Yurong,Qiu Jianhua,Chen Zhihui
High-entropy pyrochlore oxide (Y,Dy,Ce,Nd,La) 2 Sn 2 O 7 has been synthesized by the co-precipitation method. EDS and XPS analysis demonstrated the high-entropy structure in M 2 Sn 2 O 7 (M = Y, Dy, Ce, Nd, La) ultrafine powders, which is developed as the active material in lithium anode. The effects of different binders on the cycling performance and rate capability were discussed. Benefiting from the synergistic effects of high-entropy system and the strong intermolecular force provided by the sodium carboxymethyl cellulose (CMC) system, the optimized M 2 Sn 2 O 7 /CMC (M = Y, Dy, Ce, Nd, La) delivers a high initial discharge capacity of about 766 mAh g −1 and exhibits excellent cycle stability. A reversible capacity of 396 mAh g −1 and superior delivering retention of ~ 100% can be obtained at 100 mA g −1 after 100 cycles. Meanwhile, the capacity retention rate of 54.5% can still be reached after the cycling at various current densities from 0.05 to 1 A g −1 , demonstrating potential application prospect of the M 2 Sn 2 O 7 /CMC.
研究领域:
材料科学
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电化学
·
能源存储
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DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 9
·697
·
IF 3.504
Jun Yang,Taiping Xie,Chenglun Liu,Longjun Xu
Dy-doped BiOCl powder photocatalyst was synthesized A one–step coprecipitation method. The incorporation of Dy3+replaced partial Bi3+in BiOCl crystal lattice system. For Rhodamine B (RhB) under visible light irradiation, 2% Dy doped BiOCl possessed highly efficient photocatalytic activity and photodegradation efficiency. The photodegradation ratio of RhB could reach 97.3% after only 30 min of photocatalytic reaction; this was more than relative investigations have reported in the last two years. The main reason was that the 4f electron shell of Dy in the BiOCl crystal lattice system can generate a special electronic shell structure that facilitated the transfer of electron from valance band to conduction band and separation of the photoinduced charge carrier. Apart from material preparation, this research is expected to provide important references for RhB photodegradation in practical applications.Keywords:Dy3+;BiOCl;photocatalyst;RhB photodegradation;doping modification
研究领域:
材料科学
·
环境科学
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Suzhen Kang,Zhiqin Wen,Jiyuan Huang,Gaoxiang Wei,Yunming Lv,Jun Peng,Xiwen Qin,Yuhong Zhao
This study synthesizes single-phase high-entropy rare-earth chromates (M 0.2 La 0.2 Eu 0.2 Nd 0.2 Gd 0.2 )CrO 3 (M = Dy, Ho, Er) (HE-RECs) via a solid-state reaction guided by a high-entropy strategy. Their crystal structure, microstructure and magnetic properties are systematically investigated. Results show that all samples crystallize into a dense, single orthorhombic perovskite phase (space group Pbnm ) after sintering at 1350 °C for 48 h. Chemical disorder and local lattice distortion at A-site induce lattice strain and Cr 3+ /Cr 6+ mixed-valence states, forming a unique local structure. This structure effectively modulates the Cr 3+ -O 2- -Cr 3+ super-exchange/Dzyaloshinskii-Moriya (DM) interactions, as well as the f - d coupling between rare-earth ions and the Cr 3+ sublattice by altering CrO 6 octahedral connectivity. Dy-LENGCO exhibits the best total magnetic characteristics: The highest Curie temperature ( T C = 90.65K), the highest saturation magnetism ( M s = 61.44 emu/g) and the best coercivity ( H c = 310.08 Oe). This benefit is related to the high intrinsic magnetic moment of Dy 3+ ions and its magnetocrystalline anisotropy, which allow the effective pinning of domain walls within the distorted lattice. The high coercivity ( H c ) of Dy-LENGCO suppresses the reversal of magnetic moments from thermal fluctuations. This property enables long-term data storage at elevated temperatures, positioning the samples as a candidate for next-generation storage media.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Xiong Wang,Lingwei Zeng,Mengjia Chen,Zhouxi Li,Hu Zhou,Jianxian Zeng,Guoqing Liu,Tao Pang,Xiangcheng Wang,Yi Luo,Jianfeng Tang,Daqin Chen
Impurity doping is considered as a promising route to endow many functional materials with eminent properties, which may extend their applications in many research fields. As for the optical materials, great endeavors have been devoted to the fluorides over the past years, lanthanide orthovanadates receive less attention and focus. Herein, t-LaVO 4 :Ln 3+ (Ln = Eu, Dy, Sm, Tb) nanorods have been modified by the ZrOCl 2 addition, which are prepared through a hydrothermal synthesis technology. XRD, ICP, TEM, FT-IR and luminescence spectroscopy are employed to characterize the product. The morphology and luminescence performance of t-LaVO 4 :Ln 3+ nanorods could be modulated by deliberately control the ZrOCl 2 content. The average length and width of the nanorods decreases along with the increase of the ZrOCl 2 content. With regulating the content to 4 mol%, luminescence intensity are enhanced for several times and the decay lifetimes are prolonged to a certain extent. The growth mechanism and luminescence enhancement are discussed in detail. This report facilitates a novel approach for luminescence enhancement and widens the horizon for growth mechanism of LaVO 4 -based nanocrystals induced by impurity doping.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jiaxin Wang,Yifan Wang,Huixin Qiu,Huixia Zhu,Zhenyu Wang,Yue Li,Youshun Jia
We systematically study the crystal structure, magnetism and cryogenic magnetocaloric effect (MCE) in heavy rare-earth RE 6 MoO 12 ( RE = Tb, Dy, Ho, and Er) compounds. All RE 6 MoO 12 compounds belong to a cubic structure (space group: F m 3 − m ). Meanwhile, magnetic measurements illustrate that RE 6 MoO 12 compounds exhibit an antiferromagnetic (AFM) phase transition. It is proved by the slope of the basic Arrott-plots that all compounds undergo second-order magnetic phase transition (SOMT). In addition, under the applied magnetic change ΔH = 7 T, the maximum magnetic entropy change (-∆ S M max ) near Néel temperature ( T N ) is evaluated to be 12.9, 20.7, 21.1, and 21.2 J/kg K, and relative cooling power ( RCP ) is evaluated to be 308.3, 473.9, 506.2, and 381.4 J/kg for Tb 6 MoO 12 , Dy 6 MoO 12 , Ho 6 MoO 12 , and Er 6 MoO 12 , respectively. Consequently, our study underscores the magnetism and magnetocaloric effect properties exhibited by heavy rare-earth RE 6 MoO 12 compounds family, positioning them as a potential magnetic refrigerant in the field of low-temperature magnetic refrigeration.
研究领域:
凝聚态物理
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材料科学
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低温物理学
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磁学
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功能材料
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
Ren Peng,Yang Yang,Liu Dai,Guan Cheng-peng,Huang Pin-wen,Qi Ming
A novel extraction process utilizing THEE-BisDGA ligand has been developed for the rapid and efficient recovery of trivalent lanthanide elements (La, Nd, Eu, and Dy) from uranium-containing acidic systems. The process rapidly achieves equilibrium within just 2 min and exhibits high distribution ratios. Notably, its extraction efficiency shows a positive correlation with the atomic number of the lanthanides. Significantly, the ligand demonstrates exceptional selectivity by excluding U(VI) extraction, thus enabling the targeted recovery of lanthanides. Back-extraction experiments confirm that 0.01 M HNO 3 can quantitatively strip lanthanides in three steps, highlighting its potential for industrial-scale separation and purification of valuable lanthanides. Moreover, density functional theory(DFT) calculations have confirmed that THEE-BisDGA exhibits superior selectivity for Ln(III) over U(VI), further reinforcing its effectiveness and applicability in advanced separation technologies.
研究领域:
化学工程
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无机化学
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分离科学
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材料科学
·
核化学
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DOI
高影响因子
CELLULOSE
·
2021
·Vol. 29
·期 1
·469-481
·
IF 5.044
Zheng Xudong,Sun Wen,Li Ang,Wang Bin,Jiang Rong,Song Zhiqiang,Zhang Yuzhe,Li Zhongyu
Because of dysprosium’s unique physical and chemical properties and limited supply, the price of rare earth dysprosium has been high in recent years. Therefore, the study of the method of high efficiency selective separation of dysprosium has the double value of scientific research and practical economy. In this paper, we used periodic cellulose nanocrystals as the basic structure, polyethylenimine and graphene oxide were introduced, combined with imprinting technology, to construct a porous imprinted aerogel and use it for selective adsorption of Dy(III). The physical and chemical properties were characterized by SEM, FT-IR and TGA. It was proved that both polyethylenimine and graphene oxide were crosslinked effectively with cellulose nanocrystals. Adsorption experiments showed that the composite imprinted aerogel could selectively adsorb dysprosium effectively, and the maximum adsorption capacity for Dy(III) was 36.495 mg g −1 . The reproducibility experiment showed that aerogel had good regeneration ability. In conclusion, cellulose nanocrystal aerogel, which is environmentally friendly, efficient and repeatable, is expected to provide a new direction for the recovery of rare earth elements.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
Acta Biomaterialia
·
2022
·
IF 10.633
Xian Tong,Yue Han,Runqi Zhou,Wanying Jiang,Li Zhu,Yuncang Li,Shengbin Huang,Jianfeng Ma,Cuie Wen,Jixing Lin
The unique combination of biodegradability , biocompatibility, and functionality of zinc (Zn)-based alloys makes them highly desirable for a wide range of medical applications. However, a long-standing problem associated with this family of biodegradable alloys in the as-cast state is their limited mechanical strength and slow degradation rate. Here we report the development of Zn-xDy (x = 1, 3, and 5 wt.%) alloys with high strength, ductility, cytocompatibility, antibacterial ability, and appropriate degradation rate for biodegradable bone-implant applications. Our results indicate that the mechanical properties of Zn–xDy alloys were effectively improved with increasing Dy addition and hot-rolling due to the second-phase strengthening. The hot-rolled (HR) Zn–3Dy alloy showed the best combined mechanical performance with an ultimate tensile strength of 270.5 MPa, a yield strength of 214.8 MPa, an elongation of 55.1%, and Brinell hardness of 75.9 HB. The corrosion and degradation rates of HR Zn–xDy alloys in Hanks’ solution gradually increased with increasing Dy addition due to the intensification of galvanic corrosion . The HR Zn–3Dy alloy showed high antibacterial ability against S. aureus and cytocompatibility toward MC3T3-E1 cells among all the HR alloys. Overall, the HR Zn–3Dy alloy can be considered a promising biodegradable material for bone implants. Statement of significance This work reports on Zn–xDy (x = 1, 3, and 5%) alloys fabricated by Dy alloying followed by hot-rolling for biodegradable bone-implant applications. Our findings demonstrate that the hot-rolled (HR) Zn–3Dy alloy showed the best combined mechanical performance with an ultimate tensile strength of 270.5 MPa, a yield strength of 214.8 MPa, an elongation of 55.1%, and Brinell hardness of 75.9 HB. The corrosion and degradation rates of HR Zn–xDy alloys in Hanks’ solution gradually increased with increasing Dy addition due to the intensification of galvanic corrosion. Furthermore, the HR Zn–3Dy alloy showed greater antibacterial ability against S. aureus and the best cytocompatibility toward MC3T3-E1 cells among all the HR alloys.
研究领域:
材料科学
·
生物医学工程
·
组织工程
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DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Zhiyang Huang,Miao Liao,Shifan Zhang,Lixia Wang,Mingcheng Gao,Zuyang Luo,Tayirjan Taylor Isimjan,Bao Wang,Xiulin Yang
Tackling the problem of poor conductivity and catalytic stability of pristine metal-organic frameworks (MOFs) is crucial to improve their oxygen evolution reaction (OER) performance. Herein, we introduce a novel strategy of dysprosium (Dy) doping, using the unique 4 f orbitals of this rare earth element to enhance electrocatalytic activity of MOFs. Our method involves constructing Dy-doped Ni-MOF (Dy@Ni-MOF) nanoneedles on carbon cloth via a Dy-induced valence electronic perturbation approach. Experiments and density functional theory (DFT) calculations reveal that Dy doping can effectively modify the electronic structure of the Ni active centers and foster a strong electronic interaction between Ni and Dy. The resulting benefits include a reduced work function and a closer proximity of the d -band center to the Fermi level, which is conducive to improving electrical conductivity and promoting the adsorption of oxygen-containing intermediates. Furthermore, the Dy@Ni-MOF achieves superhydrophilicity, ensuring effective electrolyte contact and thus accelerating reaction kinetics. Ex-situ and in-situ analysis results manifest Dy 2 O 3 /NiOOH as the actual active species. Therefore, Dy@Ni-MOF shows impressive OER performance, significantly surpassing Ni-MOF. Besides, the overall water splitting device with Dy@Ni-MOF as an anode delivers a low cell voltage of 1.51 V at 10 mA cm −2 and demonstrates long-term stability for 100 h, positioning it as a promising substitute for precious metal catalysts.
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高影响因子
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